Constellation®
January 2006
3-12 Constellation
Radio
Configurations
Figure 3-14: OC-3/STM-1 to OC-3/STM-1 Configuration
Radio Synchronization Configuration
The High Level Mux (HLM) cards for 8, 16, and 28 DS1 radios, as available in
a repeater configuration, can be set for either Through timing or Source timing.
Through timing mode minimizes the jitter accumulation on DS1s directly
passing through multiple repeaters.
In a loop system with all repeaters, at least one repeater needs to be set for
Source timing. In large systems, the HLM cards in repeater configurations need
to be set for Source timing after 15 consecutive repeaters to clear the
accumulated jitter.
The HLM cards in a terminal configuration are always set for Source timing.
If Source timing is selected, the Service Channel must be configured with Local
Off Hook enabled.
MUX
MODEM
OC3/STM-1
RF
RF
OC3/STM-1 Terminal
OC3/STM-1 Terminal
MUX
MODEM
The HLM-155 unit can be either protected or unprotected in hot
standby Constellation terminals, depending on whether the OEM
multiplexer is protected
.
OC3/STM-1
Summary of Contents for Constellation
Page 1: ...Microwave Digital Radios Constellation Systems Application P N SAI 112874 E09...
Page 2: ......
Page 3: ...CONSTELLATION MICROWAVE RADIO SYSTEM APPLICATION MANUAL PART NO SAI 112874 E09 JANUARY 2006...
Page 4: ...Constellation January 2006...
Page 18: ...Constellation January 2006 xii Preface...
Page 20: ...Constellation January 2006 xiv Preface...
Page 24: ...Constellation January 2006 1 4 General Information...
Page 92: ...Constellation January 2006 6 10 Antenna Coupling Unit ACU...
Page 110: ...Constellation January 2006 7 18 Performance Curves...
Page 124: ...Constellation January 2006 Index 6...
Page 125: ......
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